1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/cms/CMSAttributeTableGenerationException.cs b/crypto/src/cms/CMSAttributeTableGenerationException.cs

index 31b06d6dd..87dad9929 100644
--- a/crypto/src/cms/CMSAttributeTableGenerationException.cs
+++ b/crypto/src/cms/CMSAttributeTableGenerationException.cs
@@ -2,7 +2,7 @@ using System;
 
 namespace Org.BouncyCastle.Cms
 {
-#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT)
+#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE)
     [Serializable]
 #endif
     public class CmsAttributeTableGenerationException